This "per hour" and "per day" business has to end. No one cares about "per day" and it makes it much harder to see the actual talked about load on a system. The thing that matters is "per second", so why not talk about exactly that? Load is something immediate, it's not a "per day" thing.

If someone is talking about per day numbers or per month numbers they're likely doing it to have the numbers sound more impressive and to make it harder to see how few X per second they actually handled. 11 million events per day sounds a whole lot more impressive than 128 events per second, but they're the same thing and only the latter usually matters in these types of discussions.